WO2022014279A1 - Terminal, station de base et procédé de communication - Google Patents

Terminal, station de base et procédé de communication Download PDF

Info

Publication number
WO2022014279A1
WO2022014279A1 PCT/JP2021/023665 JP2021023665W WO2022014279A1 WO 2022014279 A1 WO2022014279 A1 WO 2022014279A1 JP 2021023665 W JP2021023665 W JP 2021023665W WO 2022014279 A1 WO2022014279 A1 WO 2022014279A1
Authority
WO
WIPO (PCT)
Prior art keywords
srs
transmission
bandwidth
reference signal
upper limit
Prior art date
Application number
PCT/JP2021/023665
Other languages
English (en)
Japanese (ja)
Inventor
敬 岩井
哲矢 山本
綾子 堀内
Original Assignee
パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカ filed Critical パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカ
Priority to KR1020237000500A priority Critical patent/KR20230039638A/ko
Priority to JP2022536208A priority patent/JPWO2022014279A5/ja
Priority to MX2023000325A priority patent/MX2023000325A/es
Priority to CA3189343A priority patent/CA3189343A1/fr
Priority to BR112023000514A priority patent/BR112023000514A2/pt
Priority to US18/005,044 priority patent/US20230308330A1/en
Priority to CN202180048323.6A priority patent/CN115777228A/zh
Priority to EP21841804.4A priority patent/EP4185042A4/fr
Publication of WO2022014279A1 publication Critical patent/WO2022014279A1/fr
Priority to CONC2023/0000226A priority patent/CO2023000226A2/es

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/0012—Hopping in multicarrier systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/713—Spread spectrum techniques using frequency hopping
    • H04B1/7143—Arrangements for generation of hop patterns
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H04L27/2613—Structure of the reference signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT

Definitions

  • This disclosure relates to terminals, base stations and communication methods.
  • MIMO Multiple-Input Multiple Output
  • NR New Radio access technology
  • 3GPP 3rd Generation Partnership Project
  • Improvements in the coverage performance or capacity performance of Reference Signal (SRS) were discussed (see, for example, Non-Patent Document 1).
  • the non-limiting examples of the present disclosure contribute to the provision of terminals, base stations, and communication methods that improve the accuracy of channel estimation using a reference signal.
  • the terminal sets the first upper limit of the frequency interval in which the first reference signal is arranged in the first bandwidth to the second reference signal in the second bandwidth wider than the first bandwidth. It is provided with a control circuit for setting the frequency interval to be smaller than the second upper limit value at which the frequency interval is arranged, and a transmission circuit for transmitting the first reference signal based on the first upper limit value.
  • the channel estimation accuracy using the reference signal can be improved.
  • SRS narrowband Sounding Reference Signal
  • Block diagram showing a partial configuration example of a base station Block diagram showing a partial configuration example of a terminal Block diagram showing a configuration example of a base station Block diagram showing a terminal configuration example
  • Sequence diagram showing operation examples of base stations and terminals The figure which shows an example of the relationship between the SRS transmission bandwidth and the transmission Comb number which concerns on Embodiment 1.
  • Figure showing an example of frequency hopping of SRS The figure which shows an example of the frequency hopping of SRS which concerns on Embodiment 2.
  • NR SRS NR
  • a base station for example, sometimes referred to as “eNB” or “gNB”
  • UE User Equipment
  • SRS setting information information regarding SRS settings (hereinafter referred to as "SRS setting information”) may be notified (or set).
  • the SRS setting information is used for each SRS resource such as SRS transmission timing, SRS transmission frequency band, sequence number for reference signal generation, transmission comb number (or transmission subcarrier interval), and cyclic shift amount.
  • a parameter group "SRS resource set” may be defined.
  • the SRS setting information may be set by higher layer signaling such as the RadioResourceControl (RRC) layer. Further, the SRS setting information may be referred to as "SRS-Config" set in the RRC layer, for example.
  • RRC RadioResourceControl
  • Examples of the transmission method in the frequency band of NR SRS include "wideband SRS transmission method" and "narrowband SRS transmission method".
  • the wide band may be, for example, a band corresponding to a frequency band in which SRS can be transmitted (for example, referred to as a “Sounding bandwidth” or a “channel estimable frequency band”).
  • the narrow band may be, for example, a band narrower than the Sounding band (or wide band).
  • SRS may be transmitted in a transmission bandwidth corresponding to Bandwidth part (BWP), and wideband channel estimation may be performed at one time.
  • BWP Bandwidth part
  • the narrowband SRS transmission method for example, while changing the transmission band in time (in other words, frequency hopping), SRS is transmitted in the narrowband, and wideband channel estimation is performed using a plurality of narrowband SRS. May be done.
  • a terminal existing near the cell boundary may have a larger path loss than a terminal existing near the center of the cell.
  • there is an upper limit to the maximum transmission power of the terminal Therefore, for example, when a terminal existing near the cell boundary transmits SRS in a wide band, the received power per unit frequency in the base station tends to be low. Therefore, when a terminal existing near the cell boundary transmits SRS over a wide band, for example, the reception quality (for example, Signal to Interference and Noise Ratio (SINR)) may be lowered, and the channel estimation accuracy may be deteriorated.
  • SINR Signal to Interference and Noise Ratio
  • a narrowband SRS transmission method is applied in which transmission power allocation is narrowed down to a narrowband frequency band narrower than a wide band (in other words, the transmission power density is increased). It's okay.
  • a terminal near the center of a cell can have a smaller path loss than a terminal existing near the cell boundary. Therefore, even if the terminal near the center of the cell transmits SRS in a wide band, the received power per unit frequency for channel estimation in the base station can be secured, so that the wide band SRS transmission method may be applied.
  • the Sounding band may be set to be the same between terminals regardless of the wide band SRS and the narrow band SRS.
  • the transmission bandwidth of the wideband SRS may be set to N times the transmission bandwidth of the narrowband SRS (N is an integer).
  • N is an integer.
  • the minimum transmission bandwidth of SRS may be 4 resource blocks (RB: resource block), and the transmission bandwidth of SRS (for example, the number of RBs) may be a multiple of 4 (for example, Non-Patent Document 2). reference).
  • FIG. 1 is a diagram showing an example of transmission of a narrow band SRS in NR SRS.
  • the Sounding bandwidth is, for example, 16 RB.
  • the terminal may perform frequency hopping four times for an SRS having a transmission bandwidth of 4 RB (for example, a narrow band SRS).
  • Examples of the method of increasing the transmission power density of SRS include a method of narrowing the transmission bandwidth of SRS and a method of increasing the number of transmission combs (in other words, a method of widening the transmission subcarrier interval). Further, for example, frequency hopping is applied to narrowband SRS transmission, and channel estimation over a wide band is assumed.
  • the narrower the transmission bandwidth of SRS or the more the number of transmission combs the smaller the series length of the SRS generation series can be.
  • the sequence length of the SRS generation sequence becomes smaller, the cross-correlation (or interference) between SRS using different sequences becomes larger, and the channel estimation accuracy may deteriorate.
  • the smaller the series length of the SRS generation series the smaller the number of series having good Peak to Average Power Ratio (PAPR) characteristics or cross-correlation characteristics (for example, Constant Amplitude Zero Auto Correlation (CAZAC) characteristics).
  • PAPR Peak to Average Power Ratio
  • CAZAC Constant Amplitude Zero Auto Correlation
  • 30 sequences can be used as SRS generation sequences in each transmission bandwidth, and in adjacent cells, interference between adjacent cells can be reduced by transmitting SRS generated from different sequences.
  • the smaller the sequence length of the SRS generation sequence the larger the cross-correlation (or interference), which may deteriorate the channel estimation accuracy.
  • sequence length “M sc, b SRS ” of the sequence for generating SRS may be calculated based on the equation (1) (see, for example, Non-Patent Document 2).
  • m SRS and b represent the transmission bandwidth [RB] of SRS
  • N sc RB represents the number of subcarriers (sc: subcarrier) per RB [sc / RB]
  • K TC represents. Represents the number of Combs sent (Comb interval) [sc].
  • N sc RB 12 (fixed value) may be sufficient.
  • the SRS transmission bandwidth (m SRS, b ), the number of transmission combs (K TC ), and the sequence length (M sc, b SRS ) have the relationship shown in FIG.
  • the sequence length may be a certain threshold value (for example, 3 [sc]) or less depending on the number of transmission combs.
  • a certain threshold value for example, 3 [sc]
  • the cross-correlation (interference) between SRSs becomes large, and the channel estimation accuracy by SRS may deteriorate.
  • the communication system may include, for example, a base station 100 (eg, gNB or eNB) and a terminal 200 (eg, UE).
  • a base station 100 eg, gNB or eNB
  • a terminal 200 eg, UE
  • the base station 100 may be a base station for NR
  • the terminal 200 may be a terminal for NR.
  • the base station 100 may set SRS setting information regarding SRS transmission for the terminal 200 and receive the SRS from the terminal 200.
  • the terminal 200 may transmit SRS with a certain bandwidth and the number of transmission combs in the specified (or set) transmission band based on the SRS setting information from the base station 100, for example.
  • FIG. 3 is a block diagram showing a configuration example of a part of the base station 100 according to one aspect of the present disclosure.
  • the control unit 101 (for example, corresponding to a control circuit) has a frequency interval (for example, the number of transmitted combs) in which the first reference signal (for example, SRS) is arranged in the first bandwidth.
  • the first upper limit is set lower than the second upper limit of the frequency interval in which the second reference signal (for example, SRS) is arranged in the second bandwidth wider than the first band.
  • the receiving unit 105 (for example, corresponding to a receiving circuit) receives the first reference signal based on the first upper limit value.
  • FIG. 4 is a block diagram showing a configuration example of a part of the terminal 200 according to one aspect of the present disclosure.
  • the control unit 203 (for example, corresponding to a control circuit) has a frequency interval (for example, the number of transmitted combs) in which the first reference signal (for example, SRS) is arranged in the first bandwidth. 1
  • the upper limit is set lower than the second upper limit of the frequency interval in which the second reference signal (for example, SRS) is arranged in the second bandwidth wider than the first bandwidth.
  • the transmission unit 206 (for example, corresponding to a transmission circuit) transmits a first reference signal based on the first upper limit value.
  • FIG. 5 is a block diagram showing a configuration example of the base station 100 according to one aspect of the present disclosure.
  • the base station 100 is, for example, a control unit 101, a coding / modulation unit 102, a transmission processing unit 103, a transmission unit 104, a reception unit 105, a reception processing unit 106, and a reference signal reception unit. 107 and may have.
  • the control unit 101 may control the scheduling of SRS, for example.
  • the control unit 101 may generate SRS setting information for the target terminal 200.
  • the SRS resource set of the SRS setting information includes, for example, the transmission frequency band of each SRS resource (including, for example, the transmission bandwidth, the number of transmission combs, or the frequency hopping pattern), the transmission symbol position, the number of SRS ports, and the reference signal generation.
  • a parameter such as a sequence number, a cyclic shift amount (for example, Cyclic Shift value), or a sequence hopping may be included.
  • the control unit 101 may output, for example, control information including the generated SRS setting information to the coding / modulation unit 102.
  • the SRS setting information is, for example, target after transmission processing is performed in the coding / modulation unit 102, the transmission processing unit 103, and the transmission unit 104 as control information of the RRC layer (in other words, higher layer signaling or RRC signaling). It may be transmitted to the terminal 200.
  • control unit 101 may control the reception of SRS based on, for example, the SRS setting information.
  • control unit 101 may output the SRS setting information to the reception processing unit 106.
  • control unit 101 may generate, for example, allocation information of a frequency resource (for example, RB) of downlink data.
  • the control unit 101 may output, for example, the allocation information of the downlink data transmission radio resource to the transmission processing unit 103.
  • the coding / modulation unit 102 may encode and modulate the SRS setting information input from the control unit 101, and output the obtained modulation signal to the transmission processing unit 103, for example.
  • the transmission processing unit 103 transmits a transmission signal by, for example, mapping a modulation signal input from the coding / modulation unit 102 to a frequency band according to the allocation information of the downlink data transmission radio resource input from the control unit 101. May be formed.
  • the transmission signal is an Orthogonal Frequency Division Multiplexing (OFDM) signal
  • the transmission processing unit 103 maps the modulated signal to a frequency resource and performs inverse fast Fourier transform (IFFT) processing. May be performed to convert to a time waveform, and CP (Cyclic Prefix) is added to form an OFDM signal.
  • OFDM Orthogonal Frequency Division Multiplexing
  • IFFT inverse fast Fourier transform
  • the transmission unit 104 performs transmission radio processing such as up-conversion and digital-to-analog (D / A) conversion on the transmission signal input from the transmission processing unit 103, and transmits the transmission signal after the transmission radio processing to the antenna. May be sent via.
  • transmission radio processing such as up-conversion and digital-to-analog (D / A) conversion
  • D / A digital-to-analog
  • the receiving unit 105 performs received radio processing such as down-conversion and analog-digital (A / D) conversion on the radio signal received via the antenna, and sends the received signal after the received radio processing to the reception processing unit 106. You may output it.
  • received radio processing such as down-conversion and analog-digital (A / D) conversion on the radio signal received via the antenna, and sends the received signal after the received radio processing to the reception processing unit 106. You may output it.
  • the reception processing unit 106 identifies the resource to which the SRS is mapped based on the SRS setting information input from the control unit 101, and extracts the signal component mapped to the specified resource from the received signal. good. For example, in the case of Aperiodic SRS transmission, the reception processing unit 106 may receive SRS in a slot obtained by adding the slot offset set in the SRS resource set (s) to the DCI transmission timing. Further, for example, in the case of Semi-Persistent SRS transmission or Periodic SRS transmission, the reception processing unit 106 may periodically receive SRS in the slot specified by the transmission cycle set in the SRS resource set and the slot offset. .. Further, the reception processing unit 106 may specify, for example, the frequency resource of the SRS from the information of the transmission frequency band of the SRS resource included in the SRS setting information.
  • the reception processing unit 106 may output the SRS to the reference signal reception unit 107, for example.
  • the reference signal receiving unit 107 measures (or estimates) the reception quality (for example, channel quality) of each frequency resource based on the SRS input from the reception processing unit 106, and outputs information on the reception quality. It's okay.
  • FIG. 6 is a block diagram showing a configuration example of the terminal 200 according to one aspect of the present disclosure.
  • the terminal 200 may have, for example, a reception unit 201, a reception processing unit 202, a control unit 203, a reference signal generation unit 204, a transmission processing unit 205, and a transmission unit 206.
  • the receiving unit 201 performs received radio processing such as down-conversion and analog-digital (A / D) conversion on the radio signal received via the antenna, and sends the received signal after the received radio processing to the reception processing unit 202. You may output it.
  • received radio processing such as down-conversion and analog-digital (A / D) conversion on the radio signal received via the antenna
  • a / D analog-digital
  • the reception processing unit 202 may, for example, extract the SRS setting information included in the reception signal input from the reception unit 201 and output it to the control unit 203.
  • the reception processing unit 202 may perform, for example, CP removal processing and Fourier transform (FFT) processing.
  • the control unit 203 may control the transmission of SRS based on the SRS setting information input from the reception processing unit 202, for example. For example, when the control unit 203 detects the SRS transmission timing from the SRS setting information, the control unit 203 specifies the SRS resource set used for SRS transmission based on the SRS setting information. Then, the control unit 203 extracts the SRS resource information (for example, the transmission bandwidth, the number of transmission combs, and the frequency hopping pattern) to be applied to the SRS based on the specified SRS resource set, and the reference signal. It may be output (or instructed or set) to the generation unit 204 and the transmission processing unit 205. In the case of Aperiodic SRS transmission, the control unit 203 may detect the SRS transmission timing based on, for example, SRS setting information and DCI (for example, trigger information).
  • SRS resource information for example, the transmission bandwidth, the number of transmission combs, and the frequency hopping pattern
  • the reference signal generation unit 204 when the reference signal generation unit 204 receives a reference signal generation instruction from the control unit 203, the reference signal generation unit 204 generates a reference signal (for example, SRS) based on the SRS resource information input from the control unit 203, and the transmission processing unit 205. You may output to.
  • a reference signal for example, SRS
  • the transmission processing unit 205 may, for example, map the SRS input from the reference signal generation unit 204 to the frequency resource instructed by the control unit 203. As a result, a transmission signal is formed.
  • the transmission processing unit 205 may, for example, perform IFFT processing on the signal after mapping to the frequency resource and add CP.
  • the transmission unit 206 performs transmission radio processing such as up-conversion and digital-to-analog (D / A) conversion on the transmission signal formed in the transmission processing unit 205, and transmits the signal after the transmission radio processing via the antenna. May be sent.
  • transmission radio processing such as up-conversion and digital-to-analog (D / A) conversion on the transmission signal formed in the transmission processing unit 205, and transmits the signal after the transmission radio processing via the antenna. May be sent.
  • FIG. 7 is a sequence diagram showing an operation example of the base station 100 and the terminal 200.
  • the base station 100 sets, for example, SRS for the terminal 200 (S101).
  • the base station 100 may generate SRS setting information regarding the SRS setting.
  • the base station 100 may transmit (or set or notify) the SRS setting information to the terminal 200 by higher layer signaling (for example, RRC layer signal) (S102).
  • higher layer signaling for example, RRC layer signal
  • the base station 100 may transmit the trigger information to the terminal 200 by DCI (not shown).
  • the terminal 200 generates an SRS based on the SRS setting information transmitted from the base station 100 (S103), and transmits the generated SRS to the base station 100 (S104).
  • the base station 100 receives, for example, the SRS from the terminal 200 based on the SRS setting information transmitted to the terminal 200.
  • the number of transmission combs (in other words, the frequency interval at which the SRS is arranged) that can be set in the SRS at a certain transmission bandwidth (for example, the transmission bandwidth below the threshold value (for example, 4RB)).
  • the upper limit may be set smaller than the upper limit of the number of transmission combs that can be set in the SRS in the transmission bandwidth wider than a certain transmission band (for example, the transmission bandwidth equal to or higher than the threshold value).
  • the SRS eg, narrowband SRS placed in the transmit bandwidth below a certain threshold (eg, 4RB) has an upper limit on the number of transmit combs that can be set (or can be used) for each transmit bandwidth.
  • the value may be limited.
  • FIG. 8 is a diagram showing a setting example of the number of available transmission combs for each SRS transmission bandwidth.
  • any of transmission combs 2, 4 and 8 can be used (for example, the upper limit of the number of transmission combs: 8).
  • the upper limit of the number of available transmission combs is set smaller than that of an SRS having an SRS transmission bandwidth of 4RB or more (in other words). Then, it may be restricted).
  • the upper limit of the number of transmit combs that can be used for an SRS having an SRS transmit bandwidth of less than 4 RB may be set according to the SRS transmit bandwidth.
  • FIG. 9 is a diagram showing an example of the relationship between the SRS transmission bandwidth, the number of transmission combs, and the series length.
  • the SRS transmission bandwidth and the number of transmission combs may have the same relationship as that shown in FIG.
  • the lower limit of the SRS generation sequence length corresponding to the SRS having the SRS transmission bandwidth less than the threshold value (for example, 4RB) such as 2RB or 1RB is 6 [sc].
  • the threshold value for example, 4RB
  • the lower limit value of the SRS generation sequence length similar to that of the SRS having an SRS transmission bandwidth equal to or more than the threshold value (for example, 4RB) ( For example, 6 [sc]) can be maintained.
  • the increase in cross-correlation (or interference) between SRS due to the sequence length (in other words, the number of sequences that can be generated) of the sequence for SRS generation is suppressed, and the deterioration of the channel estimation accuracy of SRS is suppressed.
  • the sequence length in other words, the number of sequences that can be generated
  • the deterioration of the channel estimation accuracy of SRS is suppressed.
  • the present embodiment for example, by increasing the number of transmission combs for SRS, it is possible to suppress the decrease in channel estimation accuracy using SRS and increase the transmission power density of SRS, so that the coverage performance of SRS can be improved. Can be improved.
  • FIGS. 8 and 9 have described an example in which the lower limit of the series length for SRS generation is set to 6 [sc], but the lower limit of the series length is limited to 6 [sc].
  • the upper limit of the number of transmitted combs is not limited to the value shown in FIG. 8 or FIG. 10 and 11 are diagrams showing examples of other relationships between the SRS transmit bandwidth, the number of transmit combs, and the sequence length.
  • the upper limit of the number of available transmission combs may be set smaller than that in the case of FIG. As a result, for example, as shown in FIG.
  • the lower limit of the SRS generation sequence length is set (in other words, maintained) to 12 [sc], which is larger than that of FIG.
  • the lower limit of the SRS generation sequence length is set (in other words, maintained) to 12 [sc], which is larger than that of FIG.
  • the sequence length is 1/2 of the sequence length shown in FIGS. 9 and 11, and the upper limit of the number of available transmission combs is FIG. , Half as compared to FIG.
  • the minimum transmit bandwidth of NR SRS may be 4 RB and the transmit bandwidth of SRS may be a multiple of 4.
  • the narrow band SRS may be transmitted in the Sounding band N times the transmission bandwidth by frequency hopping N times (N is an integer) with respect to the narrow band SRS.
  • support for SRS with a transmission bandwidth of less than 4RB (for example, 2RB or 1RB) can be expected.
  • 4RB for example, 2RB or 1RB
  • SRS collisions with a frequency hopping pattern with a particle size of 4RB may occur.
  • FIG. 12 is a diagram showing an example of a frequency hopping pattern.
  • a frequency hopping pattern of 2RB particle size (in other words, 2RB unit) is set for the SRS transmitted by UE # 0
  • a 4RB particle size is set for the SRS transmitted by UE # 1.
  • the frequency hopping pattern (in 4RB units) is set.
  • an SRS collision transmitted from each of UE # 0 and UE # 1 may occur at least a part of the SRS transmission timing of each of UE # 0 and UE # 1.
  • the collision of SRS may cause interference between SRS, so the accuracy of channel estimation by SRS may deteriorate.
  • the control unit 101 may set, for example, the frequency hopping pattern of the SRS arranged in each transmission bandwidth.
  • the control unit 101 has a frequency hopping pattern applied to an SRS having a transmission bandwidth less than the threshold value (for example, a narrow band SRS) and a frequency hopping pattern applied to an SRS having a transmission bandwidth equal to or more than the threshold value (for example, a narrow band SRS).
  • a frequency hopping pattern may be set so that frequency resources do not collide with the pattern.
  • the control unit 101 may output, for example, SRS setting information including the set frequency hopping pattern to the coding / modulation unit 102 and the reception processing unit 106.
  • the reception processing unit 106 identifies the resource to which the SRS is mapped based on the SRS setting information (for example, including the frequency hopping pattern) input from the control unit 101, and the reception signal input from the reception unit 105.
  • the signal component (eg, SRS) mapped to the identified resource may be extracted from.
  • the terminal 200 may map and transmit SRS to a resource instructed to transmit SRS based on, for example, SRS setting information (for example, including a frequency hopping pattern) from the base station 100. ..
  • Example of setting the frequency hopping pattern for narrowband SRS An example of setting a frequency hopping pattern applied to the SRS resource included in the SRS setting information (for example, SRS resource set) generated by the base station 100 (for example, the control unit 101) will be described.
  • the frequency hopping of the SRS arranged in the transmission bandwidth of the threshold value for example, 4RB
  • SRS may be transmitted in a part of the transmission band set by the pattern.
  • the base station 100 and the terminal 200 may control the frequency hopping of the SRS having a transmission bandwidth less than the threshold value in units of the transmission band (for example, 4RB) in which the SRS having the transmission bandwidth of the threshold value is arranged for each slot. ..
  • Example 1> 13 and 14 are diagrams showing a setting example of the frequency hopping pattern of the narrow band SRS.
  • the base station 100 and the terminal 200 are, for example, SRS transmission bandwidth units (for example, 4RB units) arranged in the transmission bandwidth corresponding to the threshold value, and the transmission bandwidth is the threshold value (for example, 4RB unit).
  • Frequency hopping eg, frequency hopping between slots
  • a narrow band SRS eg, UE # 0 SRS
  • the base station 100 and the terminal 200 are, for example, a frequency hopping pattern of a narrow band SRS whose transmission bandwidth is less than a threshold value (for example, 4RB) (for example, frequency hopping set to UE # 0).
  • a threshold value for example, 4RB
  • frequency hopping may be controlled between a plurality of SRS symbols in which the SRS is arranged in the slot.
  • the SRS transmitted by UE # 0 is set with a frequency hopping pattern of 2RB particle size (in other words, the transmission bandwidth is less than the threshold value), and the SRS transmitted by UE # 1 is set to 4RB particle size (in other words, the transmission bandwidth is less than the threshold value).
  • the frequency hopping pattern (where the transmission bandwidth is equal to or greater than the threshold value) is set.
  • a 2RB narrowband SRS may be placed in 2 symbols in a slot and frequency hopping in the 4RB band in the slot.
  • the SRS arranged in the two symbols in each slot may be frequency-hopping between the slots in units of 4RB.
  • a frequency hopping pattern having a 1RB particle size (in other words, the transmission bandwidth is less than the threshold value) is set for the SRS transmitted by UE # 0, and 4RB is set for the SRS transmitted by UE # 1.
  • a frequency hopping pattern with particle size (in other words, transmission bandwidth above the threshold) is set.
  • 1 RB narrowband SRS may be arranged in 4 symbols in the slot and frequency hopping in the 4RB band in the slot.
  • the SRS arranged in the four symbols in each slot may be frequency-hopping between the slots in units of 4RB.
  • the 4RB band in which frequency hopping in slots is performed is, for example, NR SRS (or SRS in which the transmission bandwidth corresponds to a threshold value). It may be one of the bands determined based on the frequency hopping pattern. For example, as shown in FIGS. 13 and 14, the total transmission bandwidth (eg, 4RB) in which each of the plurality of SRS frequency hopping between the symbols in the slot is arranged in UE # 1 is in UE # 1. It is the same as the transmission bandwidth of the SRS placed in each slot (for example, 4RB). Further, as shown in FIGS. 13 and 14, the transmission band in which the SRS of UE # 0 is arranged may be different from the transmission band in which the SRS of UE # 1 is arranged in each slot.
  • NR SRS or SRS in which the transmission bandwidth corresponds to a threshold value
  • this frequency hopping pattern for example, the frequency hopping pattern of the narrow band SRS whose transmission bandwidth is less than the threshold (for example, 4RB) and the frequency hopping pattern of the narrow band SRS whose transmission bandwidth is the threshold (for example, 4RB) or more are different. , Orthogonal multiplexing in the frequency domain. Therefore, even when frequency hopping patterns having different particle sizes are applied to different terminals 200, it is possible to suppress the occurrence of SRS collisions.
  • a threshold value for example, 4RB
  • frequency hopping is applied between symbols in the slot, so that the hopping cycle (or frequency hopping cycle) can be reduced.
  • the hopping cycle of the SRS whose transmission bandwidth is less than the threshold is 4 slots.
  • FIG. 15 is a diagram showing a setting example of a frequency hopping pattern of a narrow band SRS.
  • the transmission bandwidth corresponds to the threshold value (for example, 4RB) for each frequency hopping cycle of SRS (for example, for each slot), and the transmission bandwidth corresponds to the threshold value (for example, for each slot).
  • Controls frequency hopping of narrowband SRS below 4RB) eg, UE # 0 SRS
  • frequency hopping of narrowband SRS with transmit bandwidth below the threshold eg, 4RB.
  • SRS may be frequency hopping in transmission bandwidth units (eg, 4RB units) of SRS whose transmission bandwidth corresponds to a threshold (eg, UE # 1 SRS). ..
  • the SRS transmitted by UE # 0 is set with a frequency hopping pattern of 2RB particle size (in other words, the transmission bandwidth is less than the threshold value), and the SRS transmitted by UE # 1 is set to 4RB particle size (in other words, the transmission bandwidth is less than the threshold value).
  • the frequency hopping pattern (where the transmission bandwidth is equal to or greater than the threshold value) is set.
  • a 2RB narrowband SRS may be arranged in one symbol in a slot, and frequency hopping may be performed between the slots in 4RB units (for example, a transmission band unit similar to the UE # 1 SRS).
  • the hopping cycle (or frequency hopping cycle) of the 2RB narrow band SRS is 8 slots.
  • a frequency hopping pattern may be set in the same manner for SRS (not shown) having a transmission bandwidth of 1RB.
  • the hopping cycle of a 1RB narrowband SRS is, for example, 16 slots.
  • the 4RB band (in other words, the hopping unit of frequency hopping between slots) in which the frequency hopping of SRS whose transmission bandwidth is less than the threshold value is performed is, for example, NR SRS (or the transmission bandwidth corresponds to the threshold value). It may be one of the bands determined based on the frequency hopping pattern of SRS). For example, as shown in FIG. 15, in each slot, the transmission band in which the SRS of UE # 0 is arranged may be different from the transmission band in which the SRS of UE # 1 is arranged.
  • this frequency hopping pattern for example, the frequency hopping pattern of the narrow band SRS whose transmission bandwidth is less than the threshold (for example, 4RB) and the frequency hopping pattern of the narrow band SRS whose transmission bandwidth is the threshold (for example, 4RB) or more are different. , Orthogonal multiplexing in the frequency domain. Therefore, even when frequency hopping patterns having different particle sizes are applied to different terminals 200, it is possible to suppress the occurrence of collisions between SRSs.
  • Example 1 compare Example 1 and Example 2.
  • Example 1 the hopping cycle of SRS whose transmission bandwidth is less than the threshold value can be set shorter than in Example 2. In other words, in Example 1, for example, it is possible to maintain a hopping cycle similar to the hopping cycle of SRS having a transmission bandwidth equal to or higher than the threshold value.
  • Example 2 the amount of SRS resources arranged in each slot can be reduced as compared with Example 1.
  • the transmission bandwidth is set by the SRS frequency hopping pattern corresponding to the threshold value (for example, 4RB).
  • SRS is transmitted in at least part of the band.
  • the frequency hopping pattern of the narrow band SRS below the threshold value may reuse the setting of the frequency hopping pattern of the SRS whose transmission bandwidth corresponds to the threshold value (in other words, a mechanism, for example, a hopping unit).
  • the SRS can be orthogonally multiplexed in the frequency domain in the frequency hopping pattern of the narrow band SRS having the transmission bandwidth less than the threshold value and the frequency hopping pattern of the narrow band SRS having the transmission bandwidth equal to or more than the threshold value. Therefore, the occurrence of collision between SRS can be suppressed. Therefore, according to the present embodiment, it is possible to suppress interference between SRSs and improve the channel estimation accuracy by SRSs.
  • the case where the SRS setting information is set in the terminal 200 by higher layer signaling for example, signaling in the RRC layer
  • the setting of the SRS setting information is in the upper layer signaling. It is not limited to other signaling (for example, physical layer signaling).
  • the target for notifying resources such as the transmission bandwidth and the number of transmission combs is not limited to the reference signal such as SRS, but may be another signal (or information).
  • the reference signal such as SRS
  • one embodiment of the present disclosure may be applied instead of SRS to a response signal to data (eg, also referred to as ACK / NACK or HARQ-ACK).
  • a candidate for an SRS resource for example, a combination of transmission bandwidth, the number of transmission combs and a series length
  • a threshold value for example, 4RB
  • an upper limit of the number of transmission combs or a frequency.
  • Parameters such as hopping particle size (eg, 1RB, 2RB or 4RB) and the number of subcarriers per RB are not limited to the above examples, and may be other values.
  • the downlink control signal may be, for example, a signal (or information) transmitted on the Physical Downlink Control Channel (PDCCH) of the physical layer, or may be a signal (or information) transmitted in the upper layer Medium Access. It may be a signal (or information) transmitted in Control (MAC) or Radio Resource Control (RRC). Further, the signal (or information) is not limited to the case of being notified by the downlink control signal, and may be predetermined in the specifications (or standards) or may be preset in the base station and the terminal.
  • PDCCH Physical Downlink Control Channel
  • RRC Radio Resource Control
  • the uplink control signal may be, for example, a signal (or information) transmitted in the PDCCH of the physical layer, or a signal transmitted in the MAC or RRC of the upper layer. (Or information) may be used. Further, the signal (or information) is not limited to the case of being notified by the uplink control signal, and may be predetermined in the specifications (or standards) or may be preset in the base station and the terminal. Further, the uplink control signal may be replaced with, for example, uplink control information (UCI), 1st stage sidelink control information (SCI), or 2nd stage SCI.
  • UCI uplink control information
  • SCI 1st stage sidelink control information
  • 2nd stage SCI 2nd stage SCI.
  • the base station is a Transmission Reception Point (TRP), a cluster head, an access point, a Remote Radio Head (RRH), an eNodeB (eNB), a gNodeB (gNB), a Base Station (BS), a Base Transceiver. It may be a Station (BTS), a master unit, a gateway, etc. Further, in side link communication, a terminal may be used instead of the base station. Further, instead of the base station, it may be a relay device that relays the communication between the upper node and the terminal.
  • TRP Transmission Reception Point
  • RRH Remote Radio Head
  • eNB eNodeB
  • gNB gNodeB
  • BS Base Station
  • BTS Base Transceiver
  • a terminal may be used instead of the base station.
  • the base station it may be a relay device that relays the communication between the upper node and the terminal.
  • an embodiment of the present disclosure may be applied to any of an uplink, a downlink, and a side link, for example.
  • an embodiment of the present disclosure may be an uplink Physical Uplink Shared Channel (PUSCH), a Physical Uplink Control Channel (PUCCH), a Physical Random Access Channel (PRACH), a downlink Physical Downlink Shared Channel (PDSCH), PDCCH, Physical. It may be applied to Broadcast Channel (PBCH), Physical Sidelink Shared Channel (PSSCH), Physical Sidelink Control Channel (PSCCH), or Physical Sidelink Broadcast Channel (PSBCH).
  • PUSCH Physical Uplink Shared Channel
  • PUCCH Physical Uplink Control Channel
  • PRACH Physical Random Access Channel
  • PDSCH Physical Downlink Shared Channel
  • PDCCH Physical. It may be applied to Broadcast Channel (PBCH), Physical Sidelink Shared Channel (PSSCH), Physical Sidelink Control Channel (PSCCH), or Physical Sidelink Broadcast Channel (PSBCH).
  • PDCCH, PDSCH, PUSCH, and PUCCH are examples of downlink control channel, downlink data channel, uplink data channel, and uplink control channel, respectively.
  • PSCCH and PSSCH are examples of a side link control channel and a side link data channel.
  • PBCH and PSBCH are examples of broadcast channels, and PRACH is an example of a random access channel.
  • Data channel / control channel One embodiment of the present disclosure may be applied to either a data channel or a control channel, for example.
  • the channel in one embodiment of the present disclosure may be replaced with any of the data channels PDSCH, PUSCH, PSSCH, or the control channels PDCCH, PUCCH, PBCH, PSCCH, PSBCH.
  • the reference signal is, for example, a signal known to both base stations and mobile stations, and may also be referred to as a reference signal (RS) or pilot signal.
  • the reference signal is Demodulation Reference Signal (DMRS), Channel State Information --Reference Signal (CSI-RS), Tracking Reference Signal (TRS), Phase Tracking Reference Signal (PTRS), Cell-specific Reference Signal (CRS), or Sounding. Any of the Reference Signal (SRS) may be used.
  • the unit of time resource is not limited to one or a combination of slots and symbols, for example, frame, superframe, subframe, slot, timeslot subslot, minislot or symbol, Orthogonal. It may be a time resource unit such as a Frequency Division Multiplexing (OFDM) symbol or a Single Carrier --Frequency Division Multiplexing (SC-FDMA) symbol, or it may be another time resource unit. Further, the number of symbols included in one slot is not limited to the number of symbols exemplified in the above-described embodiment, and may be another number of symbols.
  • OFDM Frequency Division Multiplexing
  • SC-FDMA Single Carrier --Frequency Division Multiplexing
  • One embodiment of the present disclosure may be applied to either a licensed band or an unlicensed band.
  • An embodiment of the present disclosure may be applied to any of communication between a base station and a terminal, communication between a terminal and a terminal (Sidelink communication, Uu link communication), and communication of Vehicle to Everything (V2X). good.
  • the channel in one embodiment of the present disclosure may be replaced with any of PSCCH, PSSCH, Physical Sidelink Feedback Channel (PSFCH), PSBCH, PDCCH, PUCCH, PDSCH, PUSCH, or PBCH.
  • one embodiment of the present disclosure may be applied to any of a terrestrial network, a satellite, or a non-terrestrial network (NTN: Non-Terrestrial Network) using a high altitude pseudo satellite (HAPS). .. Further, one embodiment of the present disclosure may be applied to a terrestrial network having a large transmission delay as compared with the symbol length and the slot length, such as a network having a large cell size and an ultra-wideband transmission network.
  • NTN Non-Terrestrial Network
  • HAPS high altitude pseudo satellite
  • an antenna port refers to a logical antenna (antenna group) composed of one or more physical antennas.
  • the antenna port does not necessarily refer to one physical antenna, but may refer to an array antenna or the like composed of a plurality of antennas.
  • the number of physical antennas that an antenna port is composed of is not specified, but may be specified as the minimum unit that a terminal station can transmit a reference signal.
  • the antenna port may also be defined as the smallest unit to multiply the weighting of the Precoding vector.
  • 5G fifth-generation mobile phone technology
  • NR wireless access technology
  • the system architecture is assumed to be NG-RAN (Next Generation-Radio Access Network) equipped with gNB as a whole.
  • the gNB provides the UE-side termination of the NG radio access user plane (SDAP / PDCP / RLC / MAC / PHY) and control plane (RRC) protocols.
  • SDAP NG radio access user plane
  • RRC control plane
  • the gNBs are connected to each other by an Xn interface.
  • gNB is converted to NGC (Next Generation Core) by the Next Generation (NG) interface, and more specifically, AMF (Access and Mobility Management Function) (for example, a specific core entity that performs AMF) by the NG-C interface.
  • NGC Next Generation Core
  • AMF Access and Mobility Management Function
  • UPF User Plane Function
  • NG-U interface For example, a specific core entity that performs UPF
  • the NG-RAN architecture is shown in FIG. 16 (see, for example, 3GPP TS 38.300 v15.6.0, section 4).
  • the NR user plane protocol stack (see, for example, 3GPP TS 38.300, section 4.4.1) is a PDCP (Packet Data Convergence Protocol (see Section 6.4 of TS 38.300)) sublayer, which is terminated on the network side in gNB. Includes RLC (RadioLinkControl (see Section 6.3 of TS38.300)) sublayer and MAC (Medium AccessControl (see Section 6.2 of TS38.300)) sublayer.
  • RLC RadioLinkControl
  • MAC Medium AccessControl
  • SDAP Service Data Adaptation Protocol
  • control plane protocol stack is defined for NR (see, for example, TS 38.300, section 4.4.2).
  • Layer 2 functionality is given in Section 6 of TS 38.300.
  • the functions of the PDCP sublayer, RLC sublayer, and MAC sublayer are listed in Sections 6.4, 6.3, and 6.2 of TS 38.300, respectively.
  • the functions of the RRC layer are listed in Section 7 of TS 38.300.
  • the Medium-Access-Control layer handles multiplexing of logical channels and scheduling and scheduling-related functions, including handling various numerologies.
  • the physical layer is responsible for coding, PHY HARQ processing, modulation, multi-antenna processing, and mapping of signals to appropriate physical time-frequency resources.
  • the physical layer also handles the mapping of transport channels to physical channels.
  • the physical layer provides services to the MAC layer in the form of transport channels. Physical channels correspond to a set of time-frequency resources used to transmit a particular transport channel, and each transport channel is mapped to the corresponding physical channel.
  • physical channels include PRACH (Physical Random Access Channel), PUSCH (Physical Uplink Shared Channel), and PUCCH (Physical Uplink Control Channel) as upstream physical channels, and PDSCH (Physical Downlink Shared Channel) as downlink physical channels.
  • PDCCH Physical Downlink Control Channel
  • PBCH Physical Broadcast Channel
  • NR use cases / deployment scenarios include enhanced mobile broadband (eMBB), ultra-reliable low-latency communications (URLLC), massive machine type communication (mMTC), which have diverse requirements in terms of data rate, latency, and coverage.
  • eMBB is expected to support peak data rates (20 Gbps on downlink and 10 Gbps on uplink) and user-experienced data rates as high as three times the data rates provided by IMT-Advanced. ..
  • URLLC more stringent requirements are imposed for ultra-low latency (0.5 ms for UL and DL respectively for user plane latency) and high reliability (1-10-5 within 1 ms).
  • mMTC preferably high connection densities (1,000,000 units / km2 of equipment in urban environments), wide coverage in adverse environments, and extremely long-life batteries (15 years) for low-cost equipment. Can be sought.
  • OFDM numerology suitable for one use case for example, subcarrier interval, OFDM symbol length, cyclic prefix (CP) length, number of symbols per scheduling interval
  • CP cyclic prefix
  • a low latency service preferably requires a shorter symbol length (and therefore a larger subcarrier interval) and / or a smaller number of symbols per scheduling interval (also referred to as TTI) than the mMTC service.
  • TTI time-to-Time to Physical channels
  • deployment scenarios with large channel delay spreads may preferably require a longer CP length than scenarios with short delay spreads.
  • the subcarrier spacing may be situationally optimized to maintain similar CP overhead.
  • the value of the subcarrier interval supported by NR may be one or more.
  • resource element can be used to mean the smallest resource unit consisting of one subcarrier for the length of one OFDM / SC-FDMA symbol.
  • resource grids of subcarriers and OFDM symbols are defined for each of the uplink and downlink for each numerology and each carrier.
  • Each element of the resource grid is called a resource element and is identified based on the frequency index in the frequency domain and the symbol position in the time domain (see 3GPP TS 38.211 v15.6.0).
  • FIG. 17 shows the functional separation between NG-RAN and 5GC.
  • the logical node of NG-RAN is gNB or ng-eNB.
  • the 5GC has logical nodes AMF, UPF, and SMF.
  • gNB and ng-eNB host the following main functions: -Radio Bearer Control, Radio Admission Control, Connection Mobility Control, Dynamic allocation of resources to UEs on both uplink and downlink (scheduling), etc. Radio Resource Management function; -Data IP header compression, encryption, and integrity protection; -Selection of AMF when attaching the UE when it is not possible to determine the routing to AMF from the information provided by the UE; -Routing user plane data towards UPF; -Routing control plane information for AMF; -Set up and disconnect connections; -Scheduling and sending paging messages; -Scheduling and transmission of system notification information (sourced from AMF or Operation, Admission, Maintenance); -Measurement and measurement reporting settings for mobility and scheduling; -Transport level packet marking on the uplink; -Session management; -Network slicing support; -Management of QoS flows and mapping to data radio bearers; -Support for UEs in the RRC
  • the Access and Mobility Management Function hosts the following key functions: -Ability to terminate Non-Access Stratum (NAS) signaling; -Security of NAS signaling; -Access Stratum (AS) security control; -Core Network (CN) node-to-node signaling for mobility between 3GPP access networks; -Reachability to UE in idle mode (including control and execution of paging retransmission); -Registration area management; -Support for in-system mobility and inter-system mobility; -Access authentication; -Access approval including roaming permission check; -Mobility management control (subscription and policy); -Network slicing support; -Select Session Management Function (SMF).
  • NAS Non-Access Stratum
  • AS Access Stratum
  • CN Core Network
  • the User Plane Function hosts the following key functions: -Anchor points for intra-RAT mobility / inter-RAT mobility (if applicable); -External PDU (Protocol Data Unit) session point for interconnection with data networks; -Packet routing and forwarding; -Packet inspection and policy rule enforcement for the user plane part; -Traffic usage report; -Uplink classifier to support the routing of traffic flows to the data network; -Branching Point to support multi-homed PDU sessions; -Quos processing for the user plane (eg packet filtering, gating, UL / DL rate enforcement); -Verification of uplink traffic (mapping of SDF to QoS flow); -Downlink packet buffering and downlink data notification trigger function.
  • -Anchor points for intra-RAT mobility / inter-RAT mobility if applicable
  • -External PDU Protocol Data Unit
  • -Packet routing and forwarding -Packet inspection and policy rule enforcement for the user plane part
  • Session Management Function hosts the following key functions: -Session management; -IP address assignment and management for UEs; -UPF selection and control; -Traffic steering setting function in User Plane Function (UPF) for routing traffic to appropriate destinations; -Control policy enforcement and QoS; -Notification of downlink data.
  • FIG. 18 shows some of the NAS part's interactions between the UE, gNB, and AMF (5GC entity) as the UE transitions from RRC_IDLE to RRC_CONNECTED (see TS 38.300 v15.6.0).
  • RRC is an upper layer signaling (protocol) used to set UE and gNB.
  • AMF will prepare UE context data (which includes, for example, PDU session context, security keys, UE RadioCapability, UESecurityCapabilities, etc.) and the initial context.
  • UE context data which includes, for example, PDU session context, security keys, UE RadioCapability, UESecurityCapabilities, etc.
  • gNB activates AS security together with UE. This is done by the gNB sending a SecurityModeCommand message to the UE and the UE responding to the gNB with a SecurityModeComplete message.
  • the gNB sends an RRC Reconfiguration message to the UE, and the gNB receives the RRC Reconfiguration Complete from the UE for this, so that the signaling Radio Bearer 2 (SRB 2) and the Data Radio Bearer (DRB) are reconfigured to be set up. ..
  • SRB 2 Signaling Radio Bearer 2
  • DRB Data Radio Bearer
  • the steps for RRC Reconfiguration are omitted because SRB2 and DRB are not set up.
  • gNB notifies AMF that the setup procedure is completed by the initial context setup response (INITIALCONTEXTSETUPRESPONSE).
  • the control circuit that establishes the Next Generation (NG) connection with gNodeB during operation and the signaling radio bearer between gNodeB and the user equipment (UE: User Equipment) are set up so as to be NG during operation.
  • a 5th Generation Core (5GC) entity eg, AMF, SMF, etc.
  • the gNodeB transmits RadioResourceControl (RRC) signaling including a resource allocation setting information element (IE: InformationElement) to the UE via a signaling radio bearer.
  • RRC RadioResourceControl
  • IE resource allocation setting information element
  • FIG. 19 shows some of the use cases for 5G NR.
  • the 3rd generation partnership project new radio (3GPP NR) considers three use cases envisioned by IMT-2020 to support a wide variety of services and applications.
  • the formulation of the first stage specifications for high-capacity and high-speed communication (eMBB: enhanced mobile-broadband) has been completed.
  • eMBB enhanced mobile-broadband
  • URLLC ultra-reliable and low-latency communications
  • mTC Standardization for massive machine-type communications
  • URLLC use cases have strict performance requirements such as throughput, latency, and availability.
  • the URLLC use case is envisioned as one of the elemental technologies to enable future applications such as wireless control of industrial production processes or manufacturing processes, telemedicine surgery, automation of power transmission and distribution in smart grids, traffic safety, etc. ing.
  • the ultra-high reliability of URLLC is supported by identifying technologies that meet the requirements set by TR 38.913.
  • the important requirement is that the latency of the target user plane is 0.5 ms for UL (uplink) and 0.5 ms for DL (downlink).
  • the general requirement of URLLC for one packet transmission is that when the latency of the user plane is 1 ms, the block error rate (BLER: block error rate) is 1E-5 for the packet size of 32 bytes.
  • BLER block error rate
  • the technological enhancement aimed at by NR URLLC aims to improve latency and reliability.
  • Technology enhancements to improve latency include configurable numerology, non-slot-based scheduling with flexible mapping, grant-free (configured grant) uplink, and slot-level iterations in the data channel.
  • pre-emption means that a transmission that has already been allocated a resource is stopped and that already allocated resource is used for other transmissions with later requested lower latency / higher priority requirements. Therefore, a transmission that has already been permitted will be replaced by a later transmission. Preemption is applicable regardless of the specific service type. For example, the transmission of service type A (URLLC) may be replaced by the transmission of service type B (eMBB, etc.).
  • Technical enhancements for reliability improvement include a dedicated CQI / MCS table for the 1E-5 goal BLER.
  • a feature of the mMTC (massive machine type communication) use case is that the number of connected devices that transmit a relatively small amount of data, which is typically less susceptible to delays, is extremely large.
  • the device is required to be inexpensive and have a very long battery life. From an NR perspective, utilizing a very narrow bandwidth portion is one solution that saves power and allows for longer battery life from the perspective of the UE.
  • Strict requirements are high reliability (reliability up to 10-6 levels), high availability, packet size up to 256 bytes, time synchronization up to a few microseconds (values depending on the use case). It can be 1 ⁇ s or several ⁇ s depending on the frequency range and short latencies of about 0.5 ms to 1 ms (eg, 0.5 ms latency in the target user plane).
  • NR URLLC there may be some technological enhancements from the viewpoint of the physical layer. These technological enhancements include the enhancement of PDCCH (Physical Downlink Control Channel) for compact DCI, the repetition of PDCCH, and the increase of PDCCH monitoring.
  • PDCCH Physical Downlink Control Channel
  • UCI Uplink Control Information
  • HARQ Hybrid Automatic Repeat Request
  • PUSCH Physical Uplink Control Information
  • minislot level hopping enhancements to retransmission / repetition.
  • mini slot refers to a Transmission Time Interval (TTI) that contains fewer symbols than a slot (a slot comprises 14 symbols).
  • the 5G QoS (Quality of Service) model is based on a QoS flow, and a QoS flow (GBR: Guaranteed Bit Rate QoS flow) that requires a guaranteed flow bit rate and a guaranteed flow bit rate are required. Supports any non-GBR QoS flow (non-GBR QoS flow). Therefore, at the NAS level, QoS flow is the finest grain size QoS segment in a PDU session.
  • the QoS flow is specified in the PDU session by the QoS flow ID (QFI: QoS Flow ID) carried in the encapsulation header via the NG-U interface.
  • QFI QoS Flow ID
  • 5GC For each UE, 5GC establishes one or more PDU sessions. For each UE, for a PDU session, the NG-RAN establishes at least one Data Radio Bearers (DRB), eg, as shown above with reference to FIG. Also, an additional DRB for the QoS flow of the PDU session can be set later (when to set it depends on NG-RAN).
  • DRB Data Radio Bearers
  • NG-RAN maps packets belonging to different PDU sessions to different DRBs.
  • NAS level packet filters in UEs and 5GCs associate UL packets and DL packets with QoS flows, whereas AS level mapping rules in UEs and NG-RANs associate UL QoS flows and DL QoS flows with DRBs.
  • FIG. 20 shows a non-roaming reference architecture of 5G NR (see TS 23.501 v16.1.0, section 4.23).
  • the Application Function (AF) (for example, the external application server that hosts the 5G service illustrated in FIG. 19) interacts with the 3GPP core network to provide the service. For example, accessing a Network Exposure Function (NEF) to support an application that affects traffic routing, or interacting with a policy framework for policy control (eg, QoS control) (Policy Control Function). (PCF)).
  • NEF Network Exposure Function
  • PCF Policy Control Function
  • the Application Function that is considered trusted by the operator can interact directly with the associated Network Function.
  • An Application Function that is not allowed direct access to the Network Function by the operator interacts with the relevant Network Function using the release framework to the outside via the NEF.
  • FIG. 20 shows further functional units of the 5G architecture, namely Network Slice Selection Function (NSSF), Network Repository Function (NRF), Unified Data Management (UDM), Authentication Server Function (AUSF), Access and Mobility Management Function (AMF). , Session Management Function (SMF), and Data Network (DN, eg, service by operator, Internet access, or service by a third party). All or part of the core network functions and application services may be deployed and operated in a cloud computing environment.
  • NSSF Network Slice Selection Function
  • NRF Network Repository Function
  • UDM Unified Data Management
  • AUSF Authentication Server Function
  • AMF Access and Mobility Management Function
  • SMF Session Management Function
  • DN Data Network
  • the QoS requirement for at least one of the URLLC service, the eMMB service, and the mMTC service at the time of operation is set.
  • An application server eg, AF with 5G architecture
  • Each functional block used in the description of the above embodiment is partially or wholly realized as an LSI which is an integrated circuit, and each process described in the above embodiment is partially or wholly. It may be controlled by one LSI or a combination of LSIs.
  • the LSI may be composed of individual chips, or may be composed of one chip so as to include a part or all of functional blocks.
  • the LSI may include data input and output.
  • LSIs may be referred to as ICs, system LSIs, super LSIs, and ultra LSIs depending on the degree of integration.
  • the method of making an integrated circuit is not limited to LSI, and may be realized by a dedicated circuit, a general-purpose processor, or a dedicated processor. Further, an FPGA (Field Programmable Gate Array) that can be programmed after the LSI is manufactured, or a reconfigurable processor that can reconfigure the connection and settings of the circuit cells inside the LSI may be used.
  • FPGA Field Programmable Gate Array
  • the present disclosure may be realized as digital processing or analog processing.
  • the communication device may include a wireless transceiver and a processing / control circuit.
  • the wireless transceiver may include a receiver and a transmitter, or them as a function.
  • the radio transceiver (transmitter, receiver) may include an RF (Radio Frequency) module and one or more antennas.
  • the RF module may include an amplifier, an RF modulator / demodulator, or the like.
  • Non-limiting examples of communication devices include telephones (mobile phones, smartphones, etc.), tablets, personal computers (PCs) (laptops, desktops, notebooks, etc.), cameras (digital stills / video cameras, etc.).
  • Digital players digital audio / video players, etc.
  • wearable devices wearable cameras, smart watches, tracking devices, etc.
  • game consoles digital book readers
  • telehealth telemedicines remote health Care / medicine prescription
  • vehicles with communication functions or mobile transportation automobiles, planes, ships, etc.
  • combinations of the above-mentioned various devices can be mentioned.
  • Communication devices are not limited to those that are portable or mobile, but are all types of devices, devices, systems that are not portable or fixed, such as smart home devices (home appliances, lighting equipment, smart meters or or Includes measuring instruments, control panels, etc.), vending machines, and any other "Things” that can exist on the IoT (Internet of Things) network.
  • smart home devices home appliances, lighting equipment, smart meters or or Includes measuring instruments, control panels, etc.
  • vending machines and any other “Things” that can exist on the IoT (Internet of Things) network.
  • Communication includes data communication by a combination of these, in addition to data communication by a cellular system, a wireless LAN system, a communication satellite system, etc.
  • the communication device also includes devices such as controllers and sensors that are connected or connected to communication devices that perform the communication functions described in the present disclosure.
  • devices such as controllers and sensors that are connected or connected to communication devices that perform the communication functions described in the present disclosure.
  • controllers and sensors that generate control and data signals used by communication devices that perform the communication functions of the communication device.
  • Communication devices also include infrastructure equipment, such as base stations, access points, and any other device, device, or system that communicates with or controls these non-limiting devices. ..
  • the terminal sets the first upper limit of the frequency interval in which the first reference signal is arranged in the first bandwidth to the second reference signal in the second bandwidth wider than the first bandwidth. It is provided with a control circuit for setting the frequency interval to be smaller than the second upper limit value at which the frequency interval is arranged, and a transmission circuit for transmitting the first reference signal based on the first upper limit value.
  • control circuit controls frequency hopping of the first reference signal in units of a transmission band in which the second reference signal is arranged for each unit time interval.
  • control circuit controls frequency hopping of the first reference signal between a plurality of symbols in which the plurality of first reference signals are arranged within the unit time interval.
  • control circuit controls the frequency hopping of the first reference signal for each frequency hopping cycle of the second reference signal.
  • the first bandwidth is less than the threshold
  • the second bandwidth is greater than or equal to the threshold
  • the threshold is 4 resource blocks.
  • the first upper limit is 4 subcarriers or less.
  • the first upper limit is 2 subcarriers or less.
  • the base station sets the first upper limit of the frequency interval in which the first reference signal is arranged in the first bandwidth to the second reference in the second bandwidth wider than the first bandwidth. It includes a control circuit that is set to be smaller than the second upper limit value of the frequency interval in which the signal is arranged, and a receiving circuit that receives the first reference signal based on the first upper limit value.
  • the terminal sets the first upper limit of the frequency interval in which the first reference signal is arranged in the first bandwidth in the second bandwidth wider than the first bandwidth.
  • the second upper limit value of the frequency interval in which the second reference signal is arranged is set smaller than the second upper limit value, and the first reference signal is transmitted based on the first upper limit value.
  • the base station sets the first upper limit of the frequency interval in which the first reference signal is arranged in the first bandwidth to the second bandwidth wider than the first bandwidth.
  • the frequency interval is set to be smaller than the second upper limit value of the frequency interval in which the second reference signal is arranged, and the first reference signal is received based on the first upper limit value.
  • One embodiment of the present disclosure is useful for wireless communication systems.
  • Base station 101 Base station 101, 203 Control unit 102 Coding / modulation unit 103, 205 Transmission processing unit 104, 206 Transmission unit 105, 201 Reception unit 106, 202 Reception processing unit 107 Reference signal reception unit 200 Terminal 204 Reference signal generation unit

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention permet d'obtenir une amélioration de la précision d'estimation de canal à l'aide d'un signal de référence. Ce terminal comprend : un circuit de commande pour régler une première valeur limite supérieure d'un intervalle de fréquence à laquelle un premier signal de référence est placé dans une première bande passante de telle sorte que la première valeur limite supérieure est inférieure à une seconde valeur limite supérieure d'un intervalle de fréquence auquel un second signal de référence est placé dans une seconde bande passante plus large que la première bande passante ; et un circuit de transmission pour transmettre le premier signal de référence sur la base de la première valeur limite supérieure.
PCT/JP2021/023665 2020-07-15 2021-06-22 Terminal, station de base et procédé de communication WO2022014279A1 (fr)

Priority Applications (9)

Application Number Priority Date Filing Date Title
KR1020237000500A KR20230039638A (ko) 2020-07-15 2021-06-22 단말, 기지국 및 통신 방법
JP2022536208A JPWO2022014279A5 (ja) 2021-06-22 端末、通信方法及び集積回路
MX2023000325A MX2023000325A (es) 2020-07-15 2021-06-22 Terminal, estacion base y metodo de comunicacion.
CA3189343A CA3189343A1 (fr) 2020-07-15 2021-06-22 Terminal, station de base et procede de communication
BR112023000514A BR112023000514A2 (pt) 2020-07-15 2021-06-22 Terminal, estação base e método de comunicação.
US18/005,044 US20230308330A1 (en) 2020-07-15 2021-06-22 Terminal, base station, and communication method
CN202180048323.6A CN115777228A (zh) 2020-07-15 2021-06-22 终端、基站及通信方法
EP21841804.4A EP4185042A4 (fr) 2020-07-15 2021-06-22 Terminal, station de base et procédé de communication
CONC2023/0000226A CO2023000226A2 (es) 2020-07-15 2023-01-11 Terminal, estación base y método de comunicación

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020121431 2020-07-15
JP2020-121431 2020-07-15

Publications (1)

Publication Number Publication Date
WO2022014279A1 true WO2022014279A1 (fr) 2022-01-20

Family

ID=79555280

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2021/023665 WO2022014279A1 (fr) 2020-07-15 2021-06-22 Terminal, station de base et procédé de communication

Country Status (9)

Country Link
US (1) US20230308330A1 (fr)
EP (1) EP4185042A4 (fr)
KR (1) KR20230039638A (fr)
CN (1) CN115777228A (fr)
BR (1) BR112023000514A2 (fr)
CA (1) CA3189343A1 (fr)
CO (1) CO2023000226A2 (fr)
MX (1) MX2023000325A (fr)
WO (1) WO2022014279A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010220258A (ja) * 2007-08-08 2010-09-30 Panasonic Corp 移動局装置、基地局装置、送信方法および受信方法
JP2020121431A (ja) 2019-01-29 2020-08-13 マクセルホールディングス株式会社 モデル材クリア組成物

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018230138A1 (fr) * 2017-06-15 2018-12-20 パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカ Terminal et procédé de communication
CN109802810B (zh) * 2017-11-17 2021-07-09 华为技术有限公司 发送探测参考信号srs的方法和装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010220258A (ja) * 2007-08-08 2010-09-30 Panasonic Corp 移動局装置、基地局装置、送信方法および受信方法
JP2020121431A (ja) 2019-01-29 2020-08-13 マクセルホールディングス株式会社 モデル材クリア組成物

Non-Patent Citations (7)

* Cited by examiner, † Cited by third party
Title
"NR; Physical channels and modulation (Release 16", 3GPP TS 38.211, March 2020 (2020-03-01)
3GPP TS 38.211
3GPP TS 38.300
HUAWEI, HISILICON: "SRS design for NR positioning", 3GPP DRAFT; R1-1911343, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, 9 October 2019 (2019-10-09), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , pages 1 - 20, XP051790105 *
SAMSUNG: "WID proposal for Rel.17 enhancements on MIMO for NR", RP-192436, December 2019 (2019-12-01)
See also references of EP4185042A4
SONY: "Summary of SRS", 3GPP DRAFT; R1-1718980-SUMMARY OF SRS DESIGN-V0.5, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Prague,CZ; 20171009 - 20171013, 12 October 2017 (2017-10-12), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051353462 *

Also Published As

Publication number Publication date
KR20230039638A (ko) 2023-03-21
MX2023000325A (es) 2023-02-09
US20230308330A1 (en) 2023-09-28
CA3189343A1 (fr) 2022-01-20
CO2023000226A2 (es) 2023-01-26
BR112023000514A2 (pt) 2023-01-31
EP4185042A4 (fr) 2023-11-29
EP4185042A1 (fr) 2023-05-24
CN115777228A (zh) 2023-03-10
JPWO2022014279A1 (fr) 2022-01-20

Similar Documents

Publication Publication Date Title
WO2021210264A1 (fr) Station mobile, station de base, procédé de réception et procédé de transmission
WO2022014272A1 (fr) Terminal, station de base et procédé de communication
WO2022074884A1 (fr) Terminal, station de base et procédé de communication
WO2022014279A1 (fr) Terminal, station de base et procédé de communication
WO2022014281A1 (fr) Terminal, station de base et procédé de communication
WO2022064795A1 (fr) Terminal et procédé de communication
WO2023181556A1 (fr) Terminal, station de base et procédé de communication
WO2023203938A1 (fr) Terminal, station de base, procédé de communication, et circuit intégré
WO2023181557A1 (fr) Terminal, station de base, et procédé de communication
WO2023119756A1 (fr) Dispositif de communication et procédé de communication
WO2024029157A1 (fr) Terminal, station de base et procédé de communication
WO2022208989A1 (fr) Dispositif de communication et procédé de communication
WO2023181579A1 (fr) Terminal, station de base, et procédé de communication
WO2024024259A1 (fr) Terminal, station de base, et procédé de communication
WO2023053562A1 (fr) Terminal, station de base, et procédé de communication
WO2023188913A1 (fr) Station de base, terminal, et procédé de communication
WO2024100918A1 (fr) Terminal, station de base et procédé de communication
WO2022239289A1 (fr) Dispositif de communication et procédé de communication
WO2023013192A1 (fr) Terminal, station de base et procédé de communication
EP4311331A1 (fr) Terminal, station de base et procédé de communication
WO2023243614A1 (fr) Terminal, station de base et procédé de communication
WO2022079955A1 (fr) Terminal, station de base et procédé de communication
WO2023100471A1 (fr) Station de base, terminal et procédé de communication
WO2023013204A1 (fr) Terminal, station de base et procédé de communication
WO2024034198A1 (fr) Terminal, station de base et procédé de communication

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21841804

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2022536208

Country of ref document: JP

Kind code of ref document: A

ENP Entry into the national phase

Ref document number: 3189343

Country of ref document: CA

REG Reference to national code

Ref country code: BR

Ref legal event code: B01A

Ref document number: 112023000514

Country of ref document: BR

ENP Entry into the national phase

Ref document number: 112023000514

Country of ref document: BR

Kind code of ref document: A2

Effective date: 20230111

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2021841804

Country of ref document: EP

Effective date: 20230215